Find the value of X?

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

Solve: 3x+y=6 4x-2y=18 show all work !

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers